Assembly and Method for Cooling

ABSTRACT

Materials, components, assemblies, and methods consistent with the disclosure are directed to the fabrication and use of sheets of material to provide channels for cooling through the flow of gas. An assembly for cooling can include a stack of alternating first and second blades, where each blade exhibits at least a first edge, a beveled edge, and a bend, the bend defining at least a first region and a second region, where the first region is substantially flat and bordered by the edge, the beveled edge, and the bend. An assembly can also include a sheet with folds to provide channels.

This application claims the benefit of U.S. Provisional Patent Application No. 61/941,313, filed Feb. 18, 2014, and is related to co-pending PCT Application No. PCT/US13/61887, filed Sep. 26, 2013, the contents of each of which are herein incorporated by reference, and which itself claims the benefit of U.S. Provisional Application No. 61/708,619, filed Oct. 1, 2012.

TECHNICAL FIELD

Materials, components, assemblies, and methods consistent with the present disclosure are directed to the fabrication and use of channels with a gas, where the channels are configured to control the temperature of the gas.

BACKGROUND

A volume of fluid, such as air, can be characterized by a temperature and pressure. When considered as a collection of constituent particles, comprising, for example, molecules of oxygen and nitrogen, the volume of fluid at a given temperature can be understood as a distribution of constituent particle speeds. This distribution can be characterized, generally, by an average speed which can bear a relationship with the temperature of the gas.

The internal atomic and molecular structure of constituent particles, which can provide a range of accessible internal energy states, can also affect the temperature distribution of the gas. The range of accessible internal energy states associated with an atom or molecule, in turn, can be affected by the geometry and properties of its surroundings.

SUMMARY

In an aspect, an assembly for cooling can be configured to accommodate a flow of a gas through a series of channels. The assembly can include a stack of alternating first blades and second blades. Each first blade can exhibit at least a first edge of the first blade, a beveled edge of the first blade, and a bend of the first blade, the bend of the first blade defining at least a first region of the first blade and a second region of the first blade. The first region of the first blade can be substantially flat and bordered by a first perimeter, at least a first portion of the first perimeter being the first edge of the first blade, a second portion of the first perimeter being the beveled edge of the first blade, and a third portion of the first perimeter being the bend of the first blade. The first portion of the first perimeter can be continuous with the second portion of the first perimeter, and the second portion of the first perimeter can be continuous with the third portion of the first perimeter, such that the first portion of the first perimeter is substantially parallel to the third portion of the first perimeter, and the first portion of the first perimeter is separated from the parallel third portion of the first perimeter by a first distance. The bend of the first blade can be configured to exhibit a first elevation value perpendicular to the first region of the first blade that is less than approximately 0.5 mm. Alternatively, the first elevation value can be less than approximately any one of: 0.45 mm, 0.4 mm, 0.39 mm, 0.38 mm, 0.37 mm 0.36 mm, 0.35 mm, 0.34 mm, 0.33 mm, 0.32 mm, 0.31 mm, 0.3 mm, 0.29 mm, 0.28 mm, 0.27 mm 0.26 mm, 0.25 mm, 0.24 mm, 0.23 mm, 0.22 mm, 0.21 mm, 0.2 mm, 0.19 mm, 0.18 mm, 0.17 mm 0.16 mm, 0.15 mm, 0.14 mm, 0.13 mm, 0.12 mm, 0.11 mm, 0.1 mm, 0.09 mm, 0.08 mm, 0.07 mm 0.06 mm, 0.05 mm, 0.04 mm, 0.03 mm, 0.02 mm, and 0.01 mm. Each second blade can exhibit at least a first edge of the second blade, a beveled edge of the second blade, and a bend of the second blade, the bend of the second blade defining at least a first region of the second blade and a second region of the second blade. The first region of the second blade can be substantially flat and bordered by a second perimeter, at least a first portion of the second perimeter being the first edge of the second blade, a second portion of the second perimeter being the beveled edge of the second blade, and a third portion of the second perimeter being the bend of the second blade. The first portion of the second perimeter can be continuous with the second portion of the second perimeter, and the second portion of the second perimeter can be continuous with the third portion of the second perimeter, such that the first portion of the second perimeter is substantially parallel to the third portion of the second perimeter, and the first portion of the second perimeter is separated from the parallel third portion of the second perimeter by the first distance. The bend of the second blade can be configured to exhibit a second elevation value perpendicular to the first region of the second blade that is approximately the first elevation value. The stack of alternating first blades and second blades can be configured such that, for each first blade and an adjacent second blade, the first portion of the first perimeter of each first blade is aligned with the third portion of the second perimeter of the adjacent second blade; the second portion of the first perimeter of each first blade is aligned with the second portion of the second perimeter of the adjacent second blade; and the third portion of the first perimeter of each first blade is aligned with the first portion of the second perimeter of the adjacent second blade; the stack of alternating first blades and second blades forming the series of channels for the flow of gas.

In another aspect, an assembly for cooling can include a folded sheet, where the folded sheet can exhibit a beveled edge, at least a first fold, and at least a second fold. In an aspect, the first fold and a first portion of the beveled edge can form a portion of a perimeter to a first region; the first fold, a second portion of the beveled edge, and the second fold can form a portion of a perimeter to a second region, where the first portion of the beveled edge is continuous with the second portion of the beveled edge. Further, the second fold and a third portion of the beveled edge can form a portion of a perimeter to a third region, where the second portion of the beveled edge is continuous with the third portion of the beveled edge. In an aspect, the first region of the folded sheet can be substantially flat, the second region of the folded sheet can be substantially flat, and the third region of the folded sheet can be substantially flat, and the first fold can be separated from the second fold by a first distance. Further, the first fold can be configured to present a first non-zero acute angle between the first portion of the beveled edge and the second portion of the beveled edge such that the second fold is elevated from the substantially flat first region by a value that is less than approximately one of a set of values consisting of: 0.5 mm, 0.45 mm, 0.4 mm, 0.39 mm, 0.38 mm, 0.37 mm 0.36 mm, 0.35 mm, 0.34 mm, 0.33 mm, 0.32 mm, 0.31 mm, 0.3 mm, 0.29 mm, 0.28 mm, 0.27 mm 0.26 mm, 0.25 mm, 0.24 mm, 0.23 mm, 0.22 mm, 0.21 mm, 0.2 mm, 0.19 mm, 0.18 mm, 0.17 mm 0.16 mm, 0.15 mm, 0.14 mm, 0.13 mm, 0.12 mm, 0.11 mm, 0.1 mm, 0.09 mm, 0.08 mm, 0.07 mm 0.06 mm, 0.05 mm, 0.04 mm, 0.03 mm, 0.02 mm, and 0.01 mm. Further still, the second fold can be configured to present a second non-zero acute angle between the third portion of the beveled edge and the second portion of the beveled edge such that the second non-zero acute angle is approximately the first non-zero acute angle. In an aspect, the folded sheet can be configured to present a series of channels for a flow of gas.

In another aspect, a method for forming an assembly for cooling can include providing a stack of alternating first blades and second blades. Providing a first blade can include forming a first edge of the first blade, forming a beveled edge of the first blade, and forming a bend of the first blade, the bend of the first blade defining at least a first region of the first blade and a second region of the first blade. The first region of the first blade can be substantially flat and bordered by a first perimeter, at least a first portion of the first perimeter being the first edge of the first blade, a second portion of the first perimeter being the beveled edge of the first blade, and a third portion of the first perimeter being the bend of the first blade. The first portion of the first perimeter can be continuous with the second portion of the first perimeter, and the second portion of the first perimeter can be continuous with the third portion of the first perimeter, such that the first portion of the first perimeter is substantially parallel to the third portion of the first perimeter, and the first portion of the first perimeter is separated from the parallel third portion of the first perimeter by a first distance. The bend of the first blade can be formed to exhibit a first elevation value perpendicular to the first region of the first blade that is less than approximately 0.5 mm. Alternatively, the first elevation value can be less than approximately any one of: 0.45 mm, 0.4 mm, 0.39 mm, 0.38 mm, 0.37 mm 0.36 mm, 0.35 mm, 0.34 mm, 0.33 mm, 0.32 mm, 0.31 mm, 0.3 mm, 0.29 mm, 0.28 mm, 0.27 mm 0.26 mm, 0.25 mm, 0.24 mm, 0.23 mm, 0.22 mm, 0.21 mm, 0.2 mm, 0.19 mm, 0.18 mm, 0.17 mm 0.16 mm, 0.15 mm, 0.14 mm, 0.13 mm, 0.12 mm, 0.11 mm, 0.1 mm, 0.09 mm, 0.08 mm, 0.07 mm 0.06 mm, 0.05 mm, 0.04 mm, 0.03 mm, 0.02 mm, and 0.01 mm. Providing each second blade can include forming a first edge of the second blade, forming a beveled edge of the second blade, and forming a bend of the second blade, the bend of the second blade defining at least a first region of the second blade and a second region of the second blade. The first region of the second blade can be substantially flat and bordered by a second perimeter, at least a first portion of the second perimeter being the first edge of the second blade, a second portion of the second perimeter being the beveled edge of the second blade, and a third portion of the second perimeter being the bend of the second blade. The first portion of the second perimeter can be continuous with the second portion of the second perimeter, and the second portion of the second perimeter can be continuous with the third portion of the second perimeter, such that the first portion of the second perimeter is substantially parallel to the third portion of the second perimeter, and the first portion of the second perimeter is separated from the parallel third portion of the second perimeter by the first distance. The bend of the second blade can be formed to exhibit a second elevation value perpendicular to the first region of the second blade that is approximately the first elevation value. The stack of alternating first blades and second blades can be provided such that, for each first blade and an adjacent second blade, the first portion of the first perimeter of each first blade is aligned with the third portion of the second perimeter of the adjacent second blade; the second portion of the first perimeter of each first blade is aligned with the second portion of the second perimeter of the adjacent second blade; and the third portion of the first perimeter of each first blade is aligned with the first portion of the second perimeter of the adjacent second blade.

In a further aspect, a method for forming an assembly for cooling can include providing a sheet for folding, where the sheet exhibits a beveled edge, a first face, and a second face, the second face being on an opposite side of the sheet from the first face. The method can also include providing a plurality of spacers, each spacer configured to exhibit a substantially rectangular first face and a substantially rectangular second face, the substantially rectangular second face defining a second plane that is at a non-zero acute angle to a first plane defined by the substantially rectangular first face, each spacer further configured to present a wedge-like cross-section along an axis parallel to a surface of the first plane and a surface of the second plane, each spacer further configured to exhibit an edge defined by an intersection of the substantially rectangular first face with the substantially rectangular second face. The method can also include placing at least a first spacer from the plurality of spacers adjacent to the sheet such that at least a portion of the first face of the first spacer is flush with a first portion of the first face of the sheet, forming a first fold in the sheet along the edge of the first spacer, where the first fold is configured to place a second portion of the first face of the sheet flush with at least a portion of the second face of the first spacer, placing at least a second spacer from the plurality of spacers adjacent to the sheet such that at least a portion of the second face of the second spacer is flush with a first portion of the second face of the sheet, the first portion of the second face of the sheet being on the opposite side of the second portion of the first face of the sheet, where the edge of the second spacer is substantially parallel to the edge of the first spacer and separated by a first distance. The method can also include forming a second fold in the sheet along the edge of the second spacer, where the second fold is configured to place a second portion of the second face of the sheet flush with at least a portion of the first face of the second spacer, and removing the first spacer and the second spacer from the folded sheet. Consistent with this embodiment, the first fold and a first portion of the beveled edge can form a portion of a perimeter to a first region; and the first fold, a second portion of the beveled edge, and the second fold can form a portion of a perimeter to a second region, where the first portion of the beveled edge is continuous with the second portion of the beveled edge. In addition, the second fold and a third portion of the beveled edge form a portion of a perimeter to a third region, where the first region of the folded sheet is substantially flat, the second region of the folded sheet is substantially flat, and the third region of the folded sheet is substantially flat. In addition, the first fold can be separated from the second fold by approximately the first distance; and the first fold can be configured to present approximately the non-zero acute angle between the first portion of the beveled edge and the second portion of the beveled edge such that the second fold is elevated from the substantially flat first region by a value that is less than approximately one of the following set of values: 0.5 mm, 0.45 mm, 0.4 mm, 0.39 mm, 0.38 mm, 0.37 mm 0.36 mm, 0.35 mm, 0.34 mm, 0.33 mm, 0.32 mm, 0.31 mm, 0.3 mm, 0.29 mm, 0.28 mm, 0.27 mm 0.26 mm, 0.25 mm, 0.24 mm, 0.23 mm, 0.22 mm, 0.21 mm, 0.2 mm, 0.19 mm, 0.18 mm, 0.17 mm 0.16 mm, 0.15 mm, 0.14 mm, 0.13 mm, 0.12 mm, 0.11 mm, 0.1 mm, 0.09 mm, 0.08 mm, 0.07 mm 0.06 mm, 0.05 mm, 0.04 mm, 0.03 mm, 0.02 mm, and 0.01 mm. Further, the second fold can be configured to present approximately the non-zero acute angle between the third portion of the beveled edge and the second portion of the beveled edge. Further still, the folded sheet can be configured to present a series of channels for a flow of gas.

Additional objects and advantages of the disclosure will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of embodiments consistent with the disclosure. The objects and advantages of the invention will be realized and attained by means of the elements and combinations particularly pointed out in the appended claims.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 depicts two views of an exemplary sheet for forming a blade;

FIG. 2 depicts two views of a blade consistent with the current disclosure;

FIG. 3 depicts a perspective view of the blade of FIG. 2;

FIGS. 4 and 5 depict magnified views of portions of the blade of FIG. 3;

FIG. 6 depicts one view of a stack of eight alternating first and second blades for forming a series of channels consistent with the current disclosure;

FIG. 7 depicts a perspective view of the stack of FIG. 6;

FIG. 8 depicts an exemplary method for forming a stack of blades consistent with the current disclosure;

FIG. 9 depicts a stack of several hundred alternating first and second blades for forming several hundred channels consistent with the current disclosure;

FIG. 10 depicts two stacks of alternating first and second blades and a portion of housing for an embodiment consistent with the current disclosure;

FIG. 11 and FIG. 13 depict two perspective views of an embodiment consistent with the disclosure, where the internal position of the stacks of alternating first and second blades are shown;

FIG. 12 and FIG. 14 depict two perspective views of the embodiment of FIGS. 11 and 13, and where breather openings are depicted;

FIGS. 15 and 16 depict a further embodiment consistent with the current disclosure;

FIG. 17 depicts two views of a combination of an exemplary sheet for forming a folded sheet and an exemplary spacer;

FIG. 18 depicts two views of the combination of FIG. 17, in which the exemplary sheet is folded over the exemplary spacer;

FIG. 19 depicts two views of the combination of FIG. 18, including an exemplary alternating spacer;

FIG. 20 depicts two views of the combination of FIG. 19, in which the exemplary sheet is folded over the exemplary alternating spacer;

FIG. 21 depicts two views of the combination of FIG. 20, including a further exemplary alternating spacer;

FIG. 22 depicts a side view of the combination of FIG. 21, including four additional exemplary alternating spacers and five additional folds of the exemplary sheet;

FIG. 23 depicts a side view of the combination of FIG. 22, in which the folded exemplary sheet and alternating spacer combination is compressed;

FIG. 24 depicts the combination of FIG. 23 consistent with the current disclosure, wherein the alternating spacers have been a melted, dissolved, or otherwise removed to provide channels;

FIG. 25 depicts an exemplary configuration of spacers in an alternating sequence; and

FIGS. 26-32 are associated with Appendix A, and depict an exemplary configuration of computer server systems to be cooled and a cooling system consistent with the disclosure.

DESCRIPTION OF THE EMBODIMENTS

Reference will now be made in detail to the present embodiments (exemplary embodiments) of the disclosure, characteristics of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts.

FIG. 1 depicts two views of a thermally conducting sheet 100 for forming a blade consistent with the current disclosure. The lower portion of FIG. 1 depicts an “edge” view of the sheet 100, and the upper portion of FIG. 1 depicts a “top” view of the sheet 100. For reference, axis 145 assigns a “y”-direction and an “x”-direction to the figure in the upper portion, and axis 155 assigns a “y”-direction and a “z”-direction to the figure in the lower portion. The material of the sheet 100 can include any thermally conductive material, such as alloys of copper, aluminum, silver, gold, tin, brass, bronze, steel, or anodized aluminum, and sheet 100 can also include a coating, such as titanium nitride, silicon carbide, diamond, chrome, platinum, tin, tungsten, or gold.

As illustrated in FIG. 1, the shape of the sheet 100 can be substantially rectangular. However, the depicted shape is not limiting. The width of the sheet 100 along the y-axis can be approximately 10 m or less, such as any value between approximately 10 m and approximately 1 mm (and preferably approximately 25.4 mm), or any value less than approximately 1 mm. The length of sheet 100 along the x-axis can be approximately 1 m or less, such as any value between approximately 1 m and approximately 0.5 mm (and preferably approximately 12.7 mm), or any value less than approximately 0.5 mm. The thickness of sheet 100 can be approximately 25 mm or less, such as any value between approximately 25 mm and approximately 0.025 mm (and preferably approximately 0.1778 mm), or any value less than approximately 0.025 mm.

FIG. 2 depicts two views of a first blade 200 consistent with the current disclosure. The lower portion of FIG. 2 depicts an “edge” view of the first blade 200, and the upper portion of FIG. 2 depicts a “top” view of the first blade 200. FIGS. 3-5 depict further perspective and magnified views of first blade 200.

As depicted in FIGS. 2-5, the first blade 200 can include first region 240, where the first region 240 can be substantially flat. The first region 240 can be bounded on one side by edge 260, perimeter region 210 and bend 230. Perimeter region 210 can take the form of a beveled edge 415 (as shown in further detail, for example, in FIGS. 4 and 5). Perimeter region 250 (shown opposite perimeter region 210) can be similarly beveled. Consistent with the current disclosure, the width of the perimeter region 210 and the perimeter region 250 (along the x-direction) can be less than approximately 500 mm-bounded by the overall dimensions of first blade 200 in the x-direction. For example, the width of each of the perimeter region 210 and the perimeter region 250 (along the x-direction) can be any value between approximately 500 mm and approximately 0.012 mm (and preferably approximately 0.508 mm), or any value less than approximately 0.012 mm. The bend 230 can be formed approximately 0.012 mm to approximately 500 mm from edge 265 (and preferably approximately 1 mm from edge 265), so that the width of region 230 is approximately 0.012 mm to approximately 500 mm (and preferably approximately 1 mm) Moreover, the bend 230 can have an elevation in the “z” direction such that depicted region 220 is “raised” relative to first region 240 by an amount less than approximately 0.5 mm, such as any value between approximately 0.5 mm and approximately 0.010 mm (and preferably approximately 0.254 mm), or any value less than approximately 0.01 mm. Alternatively, the value by which region 220 is “raised” relative to first region 240 can be less than approximately any one of the values: 0.45 mm, 0.4 mm, 0.39 mm, 0.38 mm, 0.37 mm 0.36 mm, 0.35 mm, 0.34 mm, 0.33 mm, 0.32 mm, 0.31 mm, 0.3 mm, 0.29 mm, 0.28 mm, 0.27 mm 0.26 mm, 0.25 mm, 0.24 mm, 0.23 mm, 0.22 mm, 0.21 mm, 0.2 mm, 0.19 mm, 0.18 mm, 0.17 mm 0.16 mm, 0.15 mm, 0.14 mm, 0.13 mm, 0.12 mm, 0.11 mm, 0.1 mm, 0.09 mm, 0.08 mm, 0.07 mm 0.06 mm, 0.05 mm, 0.04 mm, 0.03 mm, 0.02 mm, and 0.01 mm.

Consistent with the current disclosure, the first blade 200 can be formed from any source of thermally conductive sheet material. For example, first blade 200 can be formed from a carrier strip of sheet metal fed from a roll into a progressive die in a high-speed press. (See step 810 of FIG. 8)

On each cycle of the high-speed press, the die system can move the sheet metal forward to the next station in the progressive die. Moreover, the progressive die can have multiple lanes, each with the following sequence of stations: (a) a first station of the progressive die can be configured to cut three edges of sheet 100, leaving one edge connected to the carrier strip used to move the sheet 100 forward; (b) a second station of the progressive die can be configured to press the bevels into the perimeter regions 210 and 250, and also to flatten sheet 100 (to form substantially flat region 240, see step 815 of FIG. 8; (c) a third station of the progressive die configured to press the desired bend 230 into the first blade 200 (see step 820 of FIG. 8); and (d) a fourth station of the progressive die configured to cut the first blade 200 away from the carrier strip (see step 825 of FIG. 8).

Consistent with this disclosure, blades 200 being fed from the multiple lanes can be moved by robotic or simple mechanical methods into a stack 600, where the bends 230 of the stacked blades 200 can be arranged in a desired pattern of alternating orientation. FIG. 6 depicts a stack 600 of first and second blades (200-1 and 200-2) consistent with the current disclosure. The stack of first and second blades (200-1 and 200-2) forms a series of channels 650. As depicted in FIG. 6, each successive channel 650 (i.e., 650-1 and 650-2) can define triangular-shaped channels, where the “base” of the triangular-shaped channels alternates from side to side.

After formation, the stack 600 can be wrapped or boxed to maintain the desired order. FIG. 7 depicts a perspective view of the stack 600 of FIG. 6. In an embodiment, and as depicted in FIGS. 6 and 7, the stack 600 of alternating first blades (200-1) and second blades (200-2) can be configured such that, for each first blade 200-1 and an adjacent second blade 200-2: the perimeter portion 210 of each first blade 200-1 is aligned with the perimeter portion 250 of the adjacent second blade 200-2; the edge 265 each first blade 200-2 is aligned with the edge 260 of the adjacent second blade 200-2; and the edge 265 of each first blade 200-1 is aligned with the edge 260 of the adjacent second blade 200-2.

As depicted in FIGS. 6 and 7, such a structured stack of blades forms a series of channels that can accommodate a flow of gas. Moreover, as depicted in FIG. 9, an embodiment consistent with the current disclosure can have several hundred blades in a single stack—and preferably, approximately 500 blades. Alternatively, an embodiment consistent with the current disclosure can have a few blades to several tens of blades in a single stack. For example, a stack 900 of blades can be configured to be approximately 6 inches tall (i.e., approximately 150 mm) However, the overall height of the blade stack 900, consistent with the current disclosure, can be determined by the dimensions of the structure (such as a wall or other boundary) intended to be cooled.

In one embodiment, an assembly consistent with the current disclosure can be configured with two stacks of blades as described above. FIGS. 10-14 depict views of a system consistent with such an embodiment. As depicted in FIG. 10, one stack 900-1 can be affixed or otherwise attached to one U-shaped enclosure 1000-1, and a second stack 900-2 can be affixed or otherwise attached to a second U-shaped enclosure 1000-2. The method of affixing a blade stack to an enclosure can be by any means known in the art, such as (without limitation) by welding and/or by using heat-cured thermally-conductive epoxy. The two combinations (i.e., stack 900-1 and enclosure 1000-1, and stack 900-2 and enclosure 1000-2) can then be affixed together as depicted in FIG. 10 to form enclosure 1050. Each U-shaped enclosure (1000-1 and 1000-2) can be cut from U-channel extruded metal.

Additional portions of an assembly consistent with the current disclosure, as depicted in FIGS. 11-14, include ends 1110 and 1120, and tube 1130. The ends 1110 and 1120 can be cut from metal sheets, and the tube 1130 can be cut from tube stock. Support collar 1135 (as depicted, for example, in FIG. 12) can be formed of molded metal. Heat-cured thermally-conductive epoxy can be used throughout the assembly. (Alternatively, or in addition, any other means of affixing the components together can also be used, such as, without limitation, welding). For example, a rectangular area of epoxy can be applied to the inside base of one of the cut pieces of the U-shaped enclosure 1000-1 (or 1002-2), where one stack 900-1 of blades will be installed (or stack 900-2). The stack 900 of blades (900-1 or 900-2) can be aligned in contact with the epoxy on the U-shaped enclosure 1000 (1000-1 or 1000-2), and can be clamped in position. The assembly consisting of a stack 900 of blades and a U-shaped enclosure 1000 can then be baked in an oven to cure the epoxy.

As discussed, two U-shaped enclosures 1000-1 and 1000-2 with installed blade stacks 900-1 and 900-2 can then be epoxied together as follows. Epoxy can be applied to the areas where the blade stacks 900-1 or 900-2 meet the U-shaped enclosures 1000-2 or 1000-1. Epoxy can also be applied to the two side surfaces where the U-shaped enclosures (1000-1 and 1000-2) make contact with one another. These joined U-shaped enclosures can then be baked in an oven to cure the epoxy. Alternatively, or in addition, welding can be used to affix the components together.

Further, consistent with the current disclosure, the enclosure end 1110, the tube 1130, and the support collar 1135 can be assembled with epoxy at every interface and baked to cure the epoxy, and/or the components can be welded together.

Finally, where epoxy is used, the enclosure end 1120 can be clamped to the assembled U-shaped enclosure pair 1050 with epoxy in every interface and the unit can be baked to cure the epoxy.

As depicted in FIGS. 12 and 14, breather openings 1210 and 1410 can be included in the enclosure ends 1120 and 1110. Consistent with the disclosure, the breather openings 1210 and 1410, the stacks 900-1 and 900-2, and the tube 1130 define a path for a flow of gas. For example, a slight decrease of pressure can be introduced at the opening of tube 1130, which will induce the flow if gas into the breather openings 1210 and 1410 and through the channels defined in each of the stacks 900-1 and 900-2.

In accordance with another embodiment consistent with this disclosure, FIGS. 15 and 16 depict an assembly 1500 with tubes 1530. One of the tubes 1530 can serve as an “input” for a flow of gas, and the other of the tubes 1530 as an “output.” Between the two tubes (and depicted by dashed line in FIG. 15) is stack 900 of blades, aligned to permit the flow of gas between the two tubes 1530. An exemplary flow of gas, consistent with this embodiment, is depicted with arrows 1550.

Consistent with this disclosure, the width 1570 can be approximately 4.5 inches (approximately 114.3 mm), the height 1590 can be approximately 1.5 inches (approximately 38.1 mm), and the length 1580 can be approximately 5.9 inches (approximately 150 mm) Accordingly, and as depicted in FIGS. 15 and 16 (with circuit board 1610), assembly 1500 can be configured to be physically compliant with a conventional PCIe slot.

While the above example was provided in the context of cooling a computer system, one of ordinary skill in the art should appreciate that the number of blades (and the dimension of the blades) in a stack of blades can vary depending upon the cooling application. For example, and without limitation, a stack of blades for a cooling application configured to remove approximately 0.1 W from a cell phone (or other similar device) can consist of a few blades or a few tens of blades. In a cell phone application, the blades can preferably be formed, for example, from 3 mm squares of metal. Conversely, stacks of blades for larger cooling applications—such as for cooling a nuclear reactor or cooling a locomotive engine—can consist of millions of blades. For such applications, where large quantities of heat are to be extracted, the blades can preferably have dimensions, for example, of 12 mm by 25 mm.

In accordance with another aspect of this disclosure, a method of configuring a series of channels is depicted in FIGS. 17-23. A resulting embodiment, which can include a folded sheet 2300 configured to present a series of channels, is depicted in FIG. 24.

Consistent with this disclosure, FIG. 17 depicts two views of sheet 1700 and spacer 1710-1. Spacer 1710-1 can be configured to exhibit a wedge-like shape. As illustrated in FIG. 17, the shape of an overlapping region of spacer 1710-1 and sheet 1700 can be substantially rectangular. However, the depicted shape is not limiting. The width of the overlapping region along the y-axis can be approximately 10 m or less, such as any value between approximately 10 m and approximately 1 mm (and preferably approximately 25.4 mm), or any value less than approximately 1 mm. The length of the overlapping region along the x-axis can be approximately 1 m or less, such as any value between approximately 1 m and approximately 0.5 mm (and preferably approximately 12.7 mm), or any value less than approximately 0.5 mm. The thickness of sheet 1700 can be approximately 25 mm or less, such as any value between approximately 25 mm and approximately 0.025 mm (and preferably approximately 0.1778 mm), or any value less than approximately 0.025 mm.

The lower portion of FIG. 17 depicts an “edge” view of the sheet 1700 and spacer 1710-1, and the upper portion of FIG. 17 depicts a “top” view of the sheet 1700 and the spacer 1710-1. Similar to aspects of the first blade 200 depicted in FIGS. 3-5 (in relation to perimeter regions 210 and 250), the sheet 1700 can include side regions 1750. Side regions 1750 can take the form of a beveled edge, where the width of wide regions 1750 (along the x-direction) can be less than approximately 500 mm—bounded by the overall dimensions of the sheet 1700 in the x-direction. For example, the width of each of the side regions 1750 (along the x-direction) can be any value between approximately 500 mm and approximately 0.012 mm (and preferably approximately 0.508 mm), or any value less than approximately 0.012 mm One of ordinary skill in the art would appreciate that the side regions 1750 can be made beveled by conventional means, such as (without limitation) by pressing the edges of the strip of metal between the cylindrical rollers of a rolling mill.

The spacer 1710-1 can be configured to exhibit a “height” in the z-direction that is less than approximately 0.5 mm, such as any value between approximately 0.5 mm and approximately 0.010 mm (and preferably approximately 0.254 mm), or any value less than approximately 0.01 mm. Alternatively, the “height” in the z-direction of spacer 1710-1 can be less than approximately any one of the values: 0.45 mm, 0.4 mm, 0.39 mm, 0.38 mm, 0.37 mm 0.36 mm, 0.35 mm, 0.34 mm, 0.33 mm, 0.32 mm, 0.31 mm, 0.3 mm, 0.29 mm, 0.28 mm, 0.27 mm 0.26 mm, 0.25 mm, 0.24 mm, 0.23 mm, 0.22 mm, 0.21 mm, 0.2 mm, 0.19 mm, 0.18 mm, 0.17 mm 0.16 mm, 0.15 mm, 0.14 mm, 0.13 mm, 0.12 mm, 0.11 mm, 0.1 mm, 0.09 mm, 0.08 mm, 0.07 mm 0.06 mm, 0.05 mm, 0.04 mm, 0.03 mm, 0.02 mm, and 0.01 mm.

Consistent with the current disclosure, sheet 1700 in FIG. 17 is understood to extend in the y-direction (to the right in FIG. 17). FIG. 18 depicts a fold in sheet 1700 over spacer 1710-1. Again, sheet 1700 in FIG. 18 is understood to extend in the negative y-direction (to the left in FIG. 18). FIG. 19 depicts the combination of FIG. 18 with an additional spacer 1710-2, configured to present a wedge shape with the “highest” portion aligned with the “lowest” portion of spacer 1710-1 (and vice versa). Similar to spacer 1710-1, the spacer 1710-2 can be configured to exhibit a “height” in the z-direction that is less than approximately 0.5 mm, such as any value between approximately 0.5 mm and approximately 0.010 mm (and preferably approximately 0.254 mm), or any value less than approximately 0.01 mm. Alternatively, the “height” in the z-direction of spacer 1710-2 can be less than approximately any one of the values: 0.45 mm, 0.4 mm, 0.39 mm, 0.38 mm, 0.37 mm 0.36 mm, 0.35 mm, 0.34 mm, 0.33 mm, 0.32 mm, 0.31 mm, 0.3 mm, 0.29 mm, 0.28 mm, 0.27 mm 0.26 mm, 0.25 mm, 0.24 mm, 0.23 mm, 0.22 mm, 0.21 mm, 0.2 mm, 0.19 mm, 0.18 mm, 0.17 mm 0.16 mm, 0.15 mm, 0.14 mm, 0.13 mm, 0.12 mm, 0.11 mm, 0.1 mm, 0.09 mm, 0.08 mm, 0.07 mm 0.06 mm, 0.05 mm, 0.04 mm, 0.03 mm, 0.02 mm, and 0.01 mm FIG. 20 depicts the combination of FIG. 19 with an additional fold in sheet 1700 over spacer 1710-2. Again, sheet 1700 in FIG. 20 is understood to extend in the y-direction (to the right in FIG. 20). FIG. 21 depicts the combination of FIG. 20 with an additional spacer 1710-3, configured to present a wedge shape with the “highest” portion aligned with the “lowest” portion of spacer 1710-2 (and vice versa). FIG. 22 depicts the combination of FIG. 21 with five more folds, and four more spacers 1710, with each successive spacer 1710 aligned in an alternating sequence. Each successive spacer 1710 is understood to exhibit a height in the z-direction that can be less than approximately any one of the values: 0.45 mm, 0.4 mm, 0.39 mm, 0.38 mm, 0.37 mm 0.36 mm, 0.35 mm, 0.34 mm, 0.33 mm, 0.32 mm, 0.31 mm, 0.3 mm, 0.29 mm, 0.28 mm, 0.27 mm 0.26 mm, 0.25 mm, 0.24 mm, 0.23 mm, 0.22 mm, 0.21 mm, 0.2 mm, 0.19 mm, 0.18 mm, 0.17 mm 0.16 mm, 0.15 mm, 0.14 mm, 0.13 mm, 0.12 mm, 0.11 mm, 0.1 mm, 0.09 mm, 0.08 mm, 0.07 mm 0.06 mm, 0.05 mm, 0.04 mm, 0.03 mm, 0.02 mm, and 0.01 mm. In an embodiment, each successive spacer 1710 is configured to approximately (or exactly) match the dimensions of every other spacer 1710. In addition, in an embodiment, the sequence of successive spacers 1710 is configured to stack together so as to extend, approximately uniformly, into a z-direction—for example as depicted in FIG. 25 as combination 2510. However, one of ordinary skill in the art would appreciate that other combinations and sequences of heights are possible.

Consistent with an embodiment, FIG. 23 depicts the combination of FIG. 22 with substantial pressure applied to the combination (for example, in the z-direction, applied uniformly across a x-y plane) so as to substantially close and/or otherwise reduce gaps between the folded sheet 2300 and the spacers 1710. FIG. 24 depicts the combination of FIG. 23 without the spacers 1710. The spacers 1710 can be removed by applying heat to the combination (such as baking the combination in an oven) where the spacers are manufactured using hard machinable wax or a thermoplastic, such as: PMMA or high-density polyethylene. Alternatively, or in addition, spacers 1710 can be removed through a chemical process-such as by dissolving spacers constructed of PMMA with dichloromethane or trichloromethane.

As depicted in FIG. 24, the resulting folded sheet 2300 can be configured to exhibit small (less than 0.5 mm) triangular gaps with alternating orientation, such that the channels are prismatic. One of ordinary skill in the art should appreciate that folded sheet 2300 alone, or in combination with other similarly configured folded sheets, can be grouped together as previously described in connection with stacks 600 and 900, in order to be incorporated into an enclosure 1050.

Additional, and further, details, discussion and disclosure are provided in Appendix A to this disclosure—the contents of which are fully incorporated herein by reference. For avoidance of doubt, the term “blade” as used in the attached Appendix A would be understood by one of ordinary skill in the art to refer to a conventional “server blade” as used in the context of computer server systems (such as supercomputing server blades). The term “blade” as used in the Appendix A does not refer to the “blade 200” as depicted and described herein.

Other embodiments will be apparent to those skilled in the art from consideration of the specification and practice of the embodiments disclosed herein. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims. 

What is claimed is:
 1. An assembly for cooling comprising: a stack of alternating first blades and second blades; wherein each first blade exhibits at least a first edge of the first blade, a beveled edge of the first blade, and a bend of the first blade, the bend of the first blade defining at least a first region of the first blade and a second region of the first blade; wherein the first region of the first blade is substantially flat and bordered by a first perimeter, at least a first portion of the first perimeter being the first edge of the first blade, a second portion of the first perimeter being the beveled edge of the first blade, and a third portion of the first perimeter being the bend of the first blade; wherein the first portion of the first perimeter is continuous with the second portion of the first perimeter, and the second portion of the first perimeter is continuous with the third portion of the first perimeter, such that the first portion of the first perimeter is substantially parallel to the third portion of the first perimeter, and the first portion of the first perimeter is separated from the parallel third portion of the first perimeter by a first distance; wherein the bend of the first blade is configured to exhibit a first elevation value perpendicular to the first region of the first blade that is less than approximately one of a set of values consisting of: 0.5 mm, 0.45 mm, 0.4 mm, 0.39 mm, 0.38 mm, 0.37 mm 0.36 mm, 0.35 mm, 0.34 mm, 0.33 mm, 0.32 mm, 0.31 mm, 0.3 mm, 0.29 mm, 0.28 mm, 0.27 mm 0.26 mm, 0.25 mm, 0.24 mm, 0.23 mm, 0.22 mm, 0.21 mm, 0.2 mm, 0.19 mm, 0.18 mm, 0.17 mm 0.16 mm, 0.15 mm, 0.14 mm, 0.13 mm, 0.12 mm, 0.11 mm, 0.1 mm, 0.09 mm, 0.08 mm, 0.07 mm 0.06 mm, 0.05 mm, 0.04 mm, 0.03 mm, 0.02 mm, and 0.01 mm; wherein each second blade exhibits at least a first edge of the second blade, a beveled edge of the second blade, and a bend of the second blade, the bend of the second blade defining at least a first region of the second blade and a second region of the second blade; wherein the first region of the second blade is substantially flat and bordered by a second perimeter, at least a first portion of the second perimeter being the first edge of the second blade, a second portion of the second perimeter being the beveled edge of the second blade, and a third portion of the second perimeter being the bend of the second blade; wherein the first portion of the second perimeter is continuous with the second portion of the second perimeter, and the second portion of the second perimeter is continuous with the third portion of the second perimeter, such that the first portion of the second perimeter is substantially parallel to the third portion of the second perimeter, and the first portion of the second perimeter is separated from the parallel third portion of the second perimeter by the first distance; wherein the bend of the second blade is configured to exhibit a second elevation value perpendicular to the first region of the second blade that is approximately the first elevation value; wherein the stack of alternating first blades and second blades is configured such that, for each first blade and an adjacent second blade, the first portion of the first perimeter of each first blade is aligned with the third portion of the second perimeter of the adjacent second blade; the second portion of the first perimeter of each first blade is aligned with the second portion of the second perimeter of the adjacent second blade; and the third portion of the first perimeter of each first blade is aligned with the first portion of the second perimeter of the adjacent second blade; the stack of alternating first blades and second blades forming a series of channels for a flow of gas.
 2. The assembly of claim 1 wherein the gas comprises air.
 3. The assembly of claim 1 wherein each first blade exhibits at least a second beveled edge of the first blade, the second beveled edge of the first blade being continuous with the first portion of the first perimeter and the third portion of the first perimeter, the second beveled edge of the first blade being approximately parallel to the first beveled edge of the first blade; and wherein each second blade exhibits at least a second beveled edge of the second blade, the second beveled edge of the second blade being continuous with the first portion of the second perimeter and the third portion of the second perimeter, the second beveled edge of the second blade being approximately parallel to the first beveled edge of the second blade.
 4. The assembly of claim 1 wherein the first elevation value is approximately 0.254 mm, the first distance is approximately 24 mm, a largest thickness of the beveled edge of the first blade is approximately 0.178 mm, and a largest thickness of the beveled edge of the second blade is approximately 0.178 mm.
 5. The assembly of claim 4 wherein each of the first blade and the second blade comprise a material selected from a set of materials consisting of: copper, aluminum, silver, gold, tin, brass, bronze, steel, and anodized aluminum.
 6. The assembly of claim 5 wherein the material is copper.
 7. The assembly of claim 6 wherein the stack of alternating first blades and second blades includes at least 200 first blades and 200 second blades.
 8. A method for forming an assembly for cooling, comprising: providing a stack of alternating first blades and second blades; wherein each first blade exhibits at least a first edge of the first blade, a beveled edge of the first blade, and a bend of the first blade, the bend of the first blade defining at least a first region of the first blade and a second region of the first blade; wherein the first region of the first blade is substantially flat and bordered by a first perimeter, at least a first portion of the first perimeter being the first edge of the first blade, a second portion of the first perimeter being the beveled edge of the first blade, and a third portion of the first perimeter being the bend of the first blade; wherein the first portion of the first perimeter is continuous with the second portion of the first perimeter, and the second portion of the first perimeter is continuous with the third portion of the first perimeter, such that the first portion of the first perimeter is substantially parallel to the third portion of the first perimeter, and the first portion of the first perimeter is separated from the parallel third portion of the first perimeter by a first distance; wherein the bend of the first blade is configured to exhibit a first elevation value perpendicular to the first region of the first blade that is less than approximately one of a set of values consisting of: 0.5 mm, 0.45 mm, 0.4 mm, 0.39 mm, 0.38 mm, 0.37 mm 0.36 mm, 0.35 mm, 0.34 mm, 0.33 mm, 0.32 mm, 0.31 mm, 0.3 mm, 0.29 mm, 0.28 mm, 0.27 mm 0.26 mm, 0.25 mm, 0.24 mm, 0.23 mm, 0.22 mm, 0.21 mm, 0.2 mm, 0.19 mm, 0.18 mm, 0.17 mm 0.16 mm, 0.15 mm, 0.14 mm, 0.13 mm, 0.12 mm, 0.11 mm, 0.1 mm, 0.09 mm, 0.08 mm, 0.07 mm 0.06 mm, 0.05 mm, 0.04 mm, 0.03 mm, 0.02 mm, and 0.01 mm; wherein each second blade exhibits at least a first edge of the second blade, a beveled edge of the second blade, and a bend of the second blade, the bend of the second blade defining at least a first region of the second blade and a second region of the second blade; wherein the first region of the second blade is substantially flat and bordered by a second perimeter, at least a first portion of the second perimeter being the first edge of the second blade, a second portion of the second perimeter being the beveled edge of the second blade, and a third portion of the second perimeter being the bend of the second blade; wherein the first portion of the second perimeter is continuous with the second portion of the second perimeter, and the second portion of the second perimeter is continuous with the third portion of the second perimeter, such that the first portion of the second perimeter is substantially parallel to the third portion of the second perimeter, and the first portion of the second perimeter is separated from the parallel third portion of the second perimeter by the first distance; wherein the bend of the second blade is configured to exhibit a second elevation value perpendicular to the first region of the second blade that is approximately the first elevation value; wherein the stack of alternating first blades and second blades is configured such that, for each first blade and an adjacent second blade, the first portion of the first perimeter of each first blade is aligned with the third portion of the second perimeter of the adjacent second blade; the second portion of the first perimeter of each first blade is aligned with the second portion of the second perimeter of the adjacent second blade; and the third portion of the first perimeter of each first blade is aligned with the first portion of the second perimeter of the adjacent second blade.
 9. The method of claim 8 wherein the gas comprises air.
 10. The method of claim 8 wherein each first blade exhibits at least a second beveled edge of the first blade, the second beveled edge of the first blade being continuous with the first portion of the first perimeter and the third portion of the first perimeter, the second beveled edge of the first blade being approximately parallel to the first beveled edge of the first blade; and wherein each second blade exhibits at least a second beveled edge of the second blade, the second beveled edge of the second blade being continuous with the first portion of the second perimeter and the third portion of the second perimeter, the second beveled edge of the second blade being approximately parallel to the first beveled edge of the second blade.
 11. The method of claim 8 wherein the first elevation value is approximately 0.254 mm, the first distance is approximately 24 mm, a largest thickness of the beveled edge of the first blade is approximately 0.178 mm, and, a largest thickness of the beveled edge of the second blade is approximately 0.178 mm.
 12. The method of claim 11 wherein each of the first blade and the second blade comprise a material selected from a set of materials consisting of: copper, aluminum, silver, gold, tin, brass, bronze, steel, and anodized aluminum.
 13. The method of claim 12 wherein the material is copper.
 14. The method of claim 13 wherein the stack of alternating first blades and second blades includes at least 200 first blades and 200 second blades.
 15. An assembly for cooling comprising: a folded sheet; wherein the folded sheet exhibits a beveled edge, at least a first fold, and at least a second fold; wherein the first fold and a first portion of the beveled edge form a portion of a perimeter to a first region; wherein the first fold, a second portion of the beveled edge, and the second fold form a portion of a perimeter to a second region, and wherein the first portion of the beveled edge is continuous with the second portion of the beveled edge; wherein the second fold and a third portion of the beveled edge form a portion of a perimeter to a third region, and wherein the second portion of the beveled edge is continuous with the third portion of the beveled edge; wherein the first region of the folded sheet is substantially flat, the second region of the folded sheet is substantially flat, and the third region of the folded sheet is substantially flat; wherein the first fold is separated from the second fold by a first distance; wherein the first fold is configured to present a first non-zero acute angle between the first portion of the beveled edge and the second portion of the beveled edge such that the second fold is elevated from the substantially flat first region by a value that is less than approximately one of a set of values consisting of: 0.5 mm, 0.45 mm, 0.4 mm, 0.39 mm, 0.38 mm, 0.37 mm 0.36 mm, 0.35 mm, 0.34 mm, 0.33 mm, 0.32 mm, 0.31 mm, 0.3 mm, 0.29 mm, 0.28 mm, 0.27 mm 0.26 mm, 0.25 mm, 0.24 mm, 0.23 mm, 0.22 mm, 0.21 mm, 0.2 mm, 0.19 mm, 0.18 mm, 0.17 mm 0.16 mm, 0.15 mm, 0.14 mm, 0.13 mm, 0.12 mm, 0.11 mm, 0.1 mm, 0.09 mm, 0.08 mm, 0.07 mm 0.06 mm, 0.05 mm, 0.04 mm, 0.03 mm, 0.02 mm, and 0.01 mm; wherein the second fold is configured to present a second non-zero acute angle between the third portion of the beveled edge and the second portion of the beveled edge such that the second non-zero acute angle is approximately the first non-zero acute angle; wherein the folded sheet is configured to present a series of channels for a flow of gas.
 16. The assembly of claim 15 wherein the gas comprises air.
 17. The assembly of claim 15 wherein the folded sheet exhibits at least a second beveled edge, the second beveled edge being approximately parallel to the first beveled edge.
 18. The assembly of claim 15 wherein the second fold is elevated from the substantially flat first region by less than approximately 0.254 mm, the first distance is approximately 24 mm, and a largest thickness of the beveled edge is approximately 0.178 mm.
 19. The assembly of claim 18 wherein the folded sheet comprises a material selected from a set of materials consisting of: copper, aluminum, silver, gold, tin, brass, bronze, steel, and anodized aluminum.
 20. The assembly of claim 19 wherein the material is copper.
 21. The assembly of claim 20 wherein the folded sheet includes at least 50 folds.
 22. A method for forming an assembly for cooling, comprising: providing a sheet for folding, wherein the sheet exhibits a beveled edge, a first face, and a second face, the second face being on an opposite side of the sheet from the first face; providing a plurality of spacers, each spacer configured to exhibit a substantially rectangular first face and a substantially rectangular second face, the substantially rectangular second face defining a second plane that is at a non-zero acute angle to a first plane defined by the substantially rectangular first face, each spacer further configured to present a wedge-like cross-section along an axis parallel to a surface of the first plane and a surface of the second plane, each spacer further configured to exhibit an edge defined by an intersection of the substantially rectangular first face with the substantially rectangular second face; placing at least a first spacer from said plurality of spacers adjacent to the sheet such that at least a portion of the first face of the first spacer is flush with a first portion of the first face of the sheet; forming a first fold in the sheet along the edge of the first spacer, wherein the first fold is configured to place a second portion of the first face of the sheet flush with at least a portion of the second face of the first spacer; placing at least a second spacer from said plurality of spacers adjacent to the sheet such that at least a portion of the second face of the second spacer is flush with a first portion of the second face of the sheet, the first portion of the second face of the sheet being on the opposite side of the second portion of the first face of the sheet, wherein the edge of the second spacer is substantially parallel to the edge of the first spacer and separated by a first distance; forming a second fold in the sheet along the edge of the second spacer, wherein the second fold is configured to place a second portion of the second face of the sheet flush with at least a portion of the first face of the second spacer; removing the first spacer and the second spacer from the folded sheet; wherein the first fold and a first portion of the beveled edge form a portion of a perimeter to a first region; wherein the first fold, a second portion of the beveled edge, and the second fold form a portion of a perimeter to a second region, and wherein the first portion of the beveled edge is continuous with the second portion of the beveled edge; wherein the second fold and a third portion of the beveled edge form a portion of a perimeter to a third region; wherein the first region of the folded sheet is substantially flat, the second region of the folded sheet is substantially flat, and the third region of the folded sheet is substantially flat; wherein the first fold is separated from the second fold by approximately the first distance; wherein the first fold is configured to present approximately the non-zero acute angle between the first portion of the beveled edge and the second portion of the beveled edge such that the second fold is elevated from the substantially flat first region by a value that is less than approximately one of a set of values consisting of: 0.5 mm, 0.45 mm, 0.4 mm, 0.39 mm, 0.38 mm, 0.37 mm 0.36 mm, 0.35 mm, 0.34 mm, 0.33 mm, 0.32 mm, 0.31 mm, 0.3 mm, 0.29 mm, 0.28 mm, 0.27 mm 0.26 mm, 0.25 mm, 0.24 mm, 0.23 mm, 0.22 mm, 0.21 mm, 0.2 mm, 0.19 mm, 0.18 mm, 0.17 mm 0.16 mm, 0.15 mm, 0.14 mm, 0.13 mm, 0.12 mm, 0.11 mm, 0.1 mm, 0.09 mm, 0.08 mm, 0.07 mm 0.06 mm, 0.05 mm, 0.04 mm, 0.03 mm, 0.02 mm, and 0.01 mm; wherein the second fold is configured to present approximately the non-zero acute angle between the third portion of the beveled edge and the second portion of the beveled edge; and wherein the folded sheet is configured to present a series of channels for a flow of gas.
 23. The method of claim 22 wherein the gas comprises air.
 24. The method of claim 22 wherein the folded sheet exhibits at least a second beveled edge, the second beveled edge being approximately parallel to the first beveled edge.
 25. The method of claim 22 wherein the second fold is elevated from the substantially flat first region by less than approximately 0.254 mm, the first distance is approximately 24 mm, and a largest thickness of the beveled edge is approximately 0.178 mm.
 26. The method of claim 25 wherein the folded sheet comprises a material selected from a set of materials consisting of: copper, aluminum, silver, gold, tin, brass, bronze, steel, and anodized aluminum.
 27. The method of claim 26 wherein the material is copper.
 28. The method of claim 27 wherein the folded sheet includes at least 50 folds.
 29. The method of claim 22 further comprising, before removing the first spacer and the second spacer, compressing the folded sheet.
 30. The method of claim 22 wherein removing the first spacer and the second spacer comprises: melting the first spacer and the second spacer.
 31. The method of claim 22 wherein removing the first spacer and the second spacer comprises: dissolving the first spacer and the second spacer. 